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4730PL1289946 — REDUCER,BOSS

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

4730PL1289946: REDUCER,BOSS.

The REDUCER,BOSS is a the manufacturer industrial component. Key specifications include material: PLASTIC OVERALL, reducer_type: CONCENTRIC, thread_class: 3B ALL ENDS, connection_type: THREADED INTERNAL BOSS ALL ENDS, connection_style: GASKET SEAL (BOSS) ALL ENDS, nominal_thread_size: 0.562 INCHES SECOND END IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-196-1157, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
4730PL1289946
NSN: 4730-01-196-1157
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 9009H — JEDNOLITY INDEKS MATERIALOWY - UNIFORM MATERIAL INDEX (POL)
SPECIFICATIONS
materialPLASTIC OVERALL
reducer_typeCONCENTRIC
thread_class3B ALL ENDS
connection_typeTHREADED INTERNAL BOSS ALL ENDS
connection_styleGASKET SEAL (BOSS) ALL ENDS
nominal_thread_size0.562 INCHES SECOND END IN
nominal_overall_length1.125 INCHES IN
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
material_document_and_classificationASTM D-2133,GRADE 2 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN4730-01-196-1157
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 4730PL1289946 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CONNECTION STYLE: GASKET SEAL (BOSS) ALL ENDS
•
NOMINAL OVERALL LENGTH: 1.125 INCHES IN
•
CONNECTION TYPE: THREADED INTERNAL BOSS ALL ENDS
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM D-2133,GRADE 2 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD SIZE: 0.562 INCHES SECOND END IN
•
THREAD CLASS: 3B ALL ENDS
•
MATERIAL: PLASTIC OVERALL
TECHNICAL CHARACTERISTICS
CONNECTION STYLEGASKET SEAL (BOSS) ALL ENDS
NOMINAL OVERALL LENGTH1.125 INCHES IN
CONNECTION TYPETHREADED INTERNAL BOSS ALL ENDS
MATERIAL DOCUMENT AND CLASSIFICATIONASTM D-2133,GRADE 2 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD SIZE0.562 INCHES SECOND END IN
NOMINAL THREAD SIZE0.750 INCHES FIRST END IN
THREAD CLASS3B ALL ENDS
MATERIALPLASTIC OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
REDUCER TYPECONCENTRIC
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES 1
5187846Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4730PL1289946?
4730PL1289946 is a REDUCER,BOSS.
What parts can replace 4730PL1289946?
There is 1 known substitute for 4730PL1289946: 5187846. Substitute compatibility should be verified for your specific system.
What is the NSN for 4730PL1289946?
4730PL1289946 is cataloged in the U.S. Government catalog under NSN 4730-01-196-1157. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.